PARIS/MILAN, Dec 21 (Reuters) - Vivendi Chief Executive Officer Arnaud de Puyfontaine will meet Consob Italian market regulators in Rome on Friday, following complaints lodged by Italian broadcaster Mediaset, said two sources close to the matter.

Since revealing a 3 percent stake in Mediaset last week, Vivendi has rapidly tightened its grip on the Milan-based TV company, becoming the group’s second biggest investor after former Prime Minister Silvio Berlusconi’s family.

On Tuesday, the French media giant - which is led by billionaire Vincent Bollore - said it owned 25.75 percent of Mediaset’s share capital and 26.77 percent of the voting rights.

Berlusconi’s Fininvest family holding company, which owns a 38.3 percent stake in Mediaset, filed a market abuse complaint on Monday with national market authority Consob. (Reporting by Mathieu Rosemain and Gwenaelle Barzic in Paris, Giulia Segreti and Giancarlo Navach in Milan; Editing by Sudip Kar-Gupta)